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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f86351db59b1c63e65a9bed06b1b9a47fad0578e069d0d3a43d809441eb490a1' 
  AND token = '8/mTWDq26r//Wu6drPJWrIlGwMmbnA4o0xE/jBMNlzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}